I recently scored one of these amps, but alas, it doesn't have a footswitch and I'm learning that they are exceedingly rare. The amp in question is actually a three-channel Twin that was made into 2002 I believe, at which point Fender added tremolo and a four-button footswitch. My amp doesn't have tremolo and would have had a three-button switch: gain select, channel and reverb. The third channel on this puppy is Fender's take on high-gain, which is...well, interesting. Anyway, the switch spec is 0994064000. I posted this to the Fender forum too but wanted to come here as well to see if anyone can offer tips. My real question at this point is: Will anything else work with this amp? I was thinking of trying a Roland FS-6 latching footswitch. I know that's only two buttons but I don't really need to turn the reverb on and off. In closing, my god is this amp loud.